Electric system for operating speed-varying power transmission.



I R. W. BRADLEY. ELEc'rnIo sYsTEu ron OPERATING SPEED VAEYING PowE TRANSMISSION. APPLICATION FILED JAH. 28. 19 13.

1,074,599. I Patented 0ct.7,1913.

. a sHEETs-EEEET 1.

Ja? l R. W. BRADLEY. ELEOTBIO SYSTEM POE OPERATING SPEED VARYING POWER TRANSMISSION. l nrmoyrron FILED Jn. ze, ma.

1,074,599. Patented Oct. 7, 1913. v a snnn'rs-sxnz'r 2.

l l l l l' l I l 1N VENTO/e. f2 @fad/ey R. w. BRADLEY. ELECTRIC SYSTEM FOR OPERATING SPEED VARYING POWER TRANSMISSION. Y APPLICATION FILED JAN.28. 1913. 1,074,599. Patented 0611.7, 1913.

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uiaiTEn sTATEs `in 'riaivar orrioii.

RALPH w. BRADLEY, or FORT coLLfNs, comme. f-

ELECTRIC SYSTEM FOR OPERATING SPEED-VARYING POWER TRANSMISSION.

ing power transmission of the type which I transmits through the intermediary of an adjustable' combination of gears or friction wheels, the uniform rotary movement of an irreversible motor to a driven elementat different rates'of speed, and its primary object resides in providing a s stem of electrically operated devices by w ich the shiftable elementl of a transmission mechanism ofthe character described is automatically adjusted i-n accordance with the resistance o1- load encountered by the machine to which the system is applied.

While my invention is adapted for use on machines of different character, it is more particularly designed to be employed in connectioriA with the transmission of automobiles or other power drivenveliicles whose road resistances.

In proceeding in accordance with my invention, I; provide a 'centrifugal governor which is responsive to 'variations in lspee of the driven element and which through the medium of a series of electric circuit breaking devices and a therewith electrically connected electro-magnetic circuit-conj f gearing iiiclosed thereby, Fig. 3, an enlarged trolling instrument, regulates the movements of a reversible electric motor which through the medium of suitable transmission means operates the adjustable element of the power transmitting mechanism. to which the system is applied, as well as the clutch by which the rotative continuity between the primary motor or engine and the said mechanism, is secured or broken.

Included in the transmission means above referred to is a series of circuit breaking devices by which the circuits in which the motor included inthe system is connected, are automatically broken when the movable element of the power transmitting mechanism of the machine to which the system is applied has been adjustedto its proper po- Specication of Letters Patent.

Patent-ea oet. 7*, 1913.

Application filed January 28,1913. Serial No. 744,640.

sition for regulating its torque or purchase to compensate for the resistance encounltered, the connections between the reversible motor and the clutch above referred to,'being adapted to adjust the said clutch so as to break the connection between the primary motor and the transmission mechanism when the shiftable element of the latter is in its neutral position andduring the periods that the same is being changed from one speed to another.

In the operation of the system the mov. able element ofthe transmission is adjusted' the said element from its-neutral position to its low-speed posit-ion, or from its neutral position to the reverse, or vice versa, is accomplished manually'b-y means of electric switches which when the system is applied to a motor driven vehicle, are disposed within easy reach of the driver.,

`Having thus briey outlined the character and operationi of my improved system, I will now proceed to describe the same in detail by reference to the accompanying drawings 'in the various views of which like' parts are similarly designated, .and in which,

Figure l represents a side elevation of the mechanical devicescomprised in the system, Y i in lconnection with the transmission and the shown lin Fig. 1,'with the casing of the d therewith associated parts of the driving mechanism of a motor driven vehicle, Fig. 2, a plan view of the associationof devices i transmission shown in section to reveal the sectional view of the centrifugal governor 'f used in the system, Fig. 4, a fragmentary included in the means whereby the movement of the motor of the system is transtary sectional view of the lower member of the parts of the said transmission means,-

shown in Fig. 3, drawn to an enlarged scale to better illustrate the construction of the Isaid circuit breaking devices, Fig. 6, a section taken along the line 6 6, Fig. 5, Fig.

4.7, a transverse section through the governor taken along the line 7--7, Fig. 3, Fig.

mitted to the shiftable element of the power i transmission mechanism. Fig. 5, a fragmensol 8, a similar section taken along the line 8-8, Fig. 3, Fig. 9, an elevation of the parts of the mechanism by means of which the movement of the reversible motor included in *the system is transmitted to the clutch between the motor of the vehicle and the transmission of the same, the parts having been shown in this View in the position they occupy while the clutch members are interlocked in contradistinction to the position illustrated in Fig. 1 in which the clutch members are disengaged, and F ig. 10, a diagrammatic view of the electrical co-nnectionsand devices comprised in the system.

In the drawings the reference character A designates the transmission of a motor driven vehicle, which may be of any suitable construction for varying the speed of the propeller shaft in ratio to the relatively constant velocity of the driving shaft to any one ofa determinate number'of different speeds.'

In the construction shown the transmission mechanism is inclosed in a casing 2 and comprises the main gear case shaft 3 which is partially squared as at 4 for transmitting its rotary movement to the sliding -transmission element 5 and which at one of its extremities is connected with the propeller shaft 6-by means of a universal joint 7, while at its opposite end, it extends loosely into lan axial socket of an enlargement of the driving shaft 8 which, through the medium o f a clutch B, connects with-the shaft 9 of the primary motor of the vehicle which, for obvious reasons, has not been shown in the drawings. The clutch B is in the form shown, composed of a female friction member 10 secured at the end of the motor shaft and a male friction member 12 which is mounted at the end ofthe shaft 8 which latter is for the purpose of adjusting the member 12, composed of two longitudinally, slidably connected sections. sion further includes a series of four gears of different diameters which are iixedly mounted upon a counter-shaft 13, one of the said-'gears designated by the numeral 14E being continuously in mesh with an intermediate gear 15 for the reversal of the movement of the propeller shaft with relation to the direction of rotation of the driving shaft 8, while the largest one 16 of the series of gears is continuously in mesh with a'gear 17 which is formed upon the end of the driving shaft 8 into which the round extremity of the gear-case shaft f3 loosely extends. The other two gears disposed on the shaft 13 are respectively designated by the numerals 22 and and are proportioned to be engaged by correspondin gears on the shiftable eleT ment 5 to turnt e` propeller shaft at either its lowestor medium .rate of speed, with relation to thel uniform velocity of the driving The transmis- -prises a sleeve which is provided with-two gears 18 and 19 and with clutch mem-bers 20 adapted to interlock with correlative projections 21 on the gear 17.

By adjustment of the element 5 the clutch Y members 2O and 2l may be brought in interlocking engagement whereby the movement of the driving shaft 8 is directly imparted to the propeller shaft 6 at an equal rate of speed; by moving the said element so Ithat' the gear 19 is in engagement with the gear 23, the movement ofithe driving shaft vis transmitted to the driven shaft at a lower rate of speed; by bringing the gear 18 in mesh with the gear 22 the motion of the driving shaft is converted into a rotation of the propeller shaft at the lowest rate of speed; and by moving the same gear in engagement with the intermediate gear 15 the movement of the propeller shaft is reversed with relation to that of the shaft 8.

n the following description the first mentioned position of the sliding element in which the clutch members are interlocked will, for convenience be called the high position, that in which the gears 19 and 23 are in engagement the intermediate 7 p0- sition, that in which the gears 18 and 22 are in mesh the low position, and that in which the gear 18 engages the intermediate gear 15, the reverse position, while the position of the sliding element in which its gear 18 is situated between the gears 15 and 22, as shownA in the drawings, will be referred to as the neutral position.

The elements ofthe transmission mechanism so far described are per se, not part of my invention, their construction is shown merely to convey an understanding asV to the general type of power transmittin devices to which my invention is particular y adapted, and I desire it understood that my system for operating the shiftable gears 18 and 19 and the clutch B as will now be described, is equally applicable to transmissions of different character and construction.

My system for operating the transmission comprises, briey, a reversible motor D which,y through the intermediary of a suitable transmissionv mechanism actuates the sliding element of the transmission A, as well as the clutch B, the said mechanism including a series of circuit breaking devices E which serve to break the circuits in which the motor D is connected after the les parts have been adjusted to the desired podisposed to be successively closed Y.by the action of the governor, and H the electromagnetic reversing device through the medium of Which the movements of the re? shaft 26 mesheswith a rack 29 which is slidy means of a rod 32 Whichvis attached to therl on the ledge 30jof the gear case at distancesV ably supported upon a ledge 30 on the side of the gear case and held against lateral displacement by means of straps 31. The rack is rigidly connected with the sliding element 5 of the transmission A by sleeve of the said element by means of a connection 33 and which being longitudinally movably supported in openings :in the end Walls of the gear case, is connected at one end of the rack 29 with which it is parallel. The shaft 26y is furthermore provided at its ends with oppositely extending crank arms 34 which by means of pitmans 35 are connected respectively With crank arms 36 and 36 Which project in one direction from the ends' of a rocker shaft 37l ported bearings 38.

The rocker shaft is by means of a forked arm 39 connected With a trunnioned collar 40v on the sliding section of the driving shaft which is] rotatably mounted lin suitably sup- 8, its function being to alternately move thev clutch member 12 at the end of said section, in and out of engagement with its female correlative at the end "of the motor shaft 9 during adjustment of the sliding gear ele ment 5 by means of the motor D. l

The pitmans 35 are 1 at their extremities at which' they connect with the crank varms of the rocker shaft 37, provided With longitudinal slots 41 into which the Wrist pins of said crank arms loosely extend, and the parts 'of the clutch movement are coperatively arranged so that the movement of the rocker shaft, and in consequence that of the longitudinallymovable section of the driving shaft, Will be reversed during each movement of the shaft 26 throughja quadrant arc, irrespective of its direction. The units of the series of circuit breakers E are disposed in longitudinal alinement apart whichv are in ratio to the. spaces through which the sliding element 5 of the transmission must travel from its neutral position shown i'n the drawings to either the reverse or the low positions or from the low position to the intermediate position, and from the intermediate position to thel high position and vice versa..

Each of the circuit breakersconsist of a piston composed oftwo disks 42 and 43 attached at .opposite ends of a stem 44, a block 55 of fiber or other nonconductivel material which is fitted in a recess in the lower portion of the ledge 30, has in its bottom surface, sockets 45 to receive the lower'disks 42 of the pistons and in axial alinement with said sockets, openings in which the stems 44 of the pistons are slidably fitted.

They disks 43 at the upper ends of the pistons are movably disposed in openings 47 in the portion of the ledge above its recess and are normally held in engagement with shoulders at the upper ends of said ,openings by means of springs 46'Which are coiled Within the latter around the stems of the respective pistons.

Secured on the insulating block 55 in the upper portions of the .sockets 45, are sets A ofv contacts 48 which are connected at oppo-.

. and Which are normally maintained in electrical connection by the engagement ofthe disks 42 of the respective pistons.

The sockets of the circuit breakers Which by their relative position correspond With the neutral, low .and intermediate position of the 'transmission gearing, have tWo sets of contacts which are conn cted in the 'circuits by which the motor is operated to rotate in opposite directions and the sockets of the units at the ends of the series E have each, yone set of contacts which are connected respectively in the circuits by which the motorA is actuated to move the sliding element of the transmission from the neutral to the reverse position or from the intermediate to the high position.

A plunger 49 which is vertically movably fitted in a pocket in the lower surface of the rack 29, has a pointed extremity which when brought in register with one or another of the openings 47 in the ledge 30, enters-the same to depress by the action of a'spring 50 disposed in the upper portion' of the pocket, the respective piston -for the purpose of separating its disk 42 from the contacts 4 8 normally engaged thereby. The governor F which also is mountedl on the gear case 2 consists, as shown in Fig. 3, v7 andS of the drawings, of a casing 51. in which a vertical shaft 52 is rotatably mounted by means of ball bearings 53. The casing has in a recess of its bottom surface, a block 54 of fiber-or other insulating material in which are set six concentric metallic rings 56, 57, 58, 5960 and 61, the upper surfaces of which are continuously engaged by metalprised in the system.

conductive engagement of the plungers with the respective rings and the said plungers are, with the exception'of that which engages the outer ring 61, separately connectedl by-means of conductors 65 with the members 66 of the circuit breakers comprised in the series G which are mounted upon the arm 63, andwhose other members 67 are by means of a conductor 68, vconnected with the outer ring which is in electric connection with a pole of the source of electricity from which the current required in the operation of the system is derived.

The actuative element of thel governor consists of a weight 69 which is slidably disposed in a hollow radial arm 'Z0 secured to the shaft 52 and which during the rotary movement of the latter is, by centrifugal force, driven against'v the pressure exerted by one or both of a pair of springs 71 and 720i unequal length and proportionately different strength which are disposed in the outer portions of the hollow arms.

A Weight 78 and springs 74 and 7 5 similar to those above described, are disposed in a hollow arm 76 extendingoppositely from the arm 70, to provide-a counter-poise for the usual purpose. The shaft of the governor is by means ot a pair ot internfieshingA beveled gears 7'( and 78, operatively connected with the main gear case shaft 3 which throughthe instrumentality of the universal p joint 7, is connected with the propeller shaft 6. y,

rlhe reversing device H of ^the system which controls the movements ot' the re ver-sible motor D has been shown merely in outline in the diagrammatic representation shown in Fig. 10 of the drawings. llt may be secured upon the motor casing or any other suitable part of the mechanism and it consists of two 'oppositely disposed electromagnetic coils 7 9 and 80, and a single armature 81 which has a reciprocating movement between the same and which by engagement with four sets of contacts 81a and82 disposed in groups of two at opposite sides thereof, alternately open and close the circuits of which said contacts are the terminals. t

Having thus described thev mechanical ,construction of .the several elements comprised in the system, l will inow proceed to explain its operation by reference to the diagrammatic view in whichthe said ele-v ments have been designated in general by the same reference characters used in the preceding description, while the units of the series of circuit breakers E have been desig- -nated respectively bythe numerals 83, 84,

85, 86 and 87 to :t 1cilitate the explanation of the many electrical connections com- The motor D including the armature D3 and the field D2 vis of the reversible type, its

rotary movement in opposite directions being controlled by the reversing device H which, as hereinbefore explained, is composed of two electro-magnetic coils 7 9 and 80 and a common reciprocating armature 81 which when moved by the magnetization ofpone of the coils, closes the circuit which causes a rotary movement of the motor armature in one direction and which when attracted by the other coil closes the circuits which supply the current for rotating the motor in the opposite direction.l

The rotary movements of the motor are by means hereinbefore described, converted into a sliding movement of the element 5 of the transmission A and it will be observed that when'thev motor armature moves counter-clock-wise, the said element will move in the direction of the arrow Y, lllig. 2 to increase the velocity of the propeller shaft or for terminating its movement ina direction reverse to that of the shaft 8 by disengaging the wheel 18 from the intermediate gear 15, and that when the armature of the motor D rotates in the opposite direction, the sliding v`element of the transmission is moved in the direction indicated by the arrow X in Fig. 2, toieither decrease the speed of the propeller shaft or 'to reverse-its movement vwith relation'to the direction of rotation of the shaft 8 which through the medium ot the clutch' B, connects with the primary motor of the vehicle.

rlhe circuits which when completedv cause for rotating the motor D counter-clock-wise being completed only when the armature 8l is attracted toward the coil 80, while those by which the motor is turned clockwise are closed when by magnetization of the coil 79, the said armaturel is moved in t-he opposite direction.

The operation of the controlling instru* ment is effected automatically by the engagement of the sliding weight 69 of the governor with the circuit breakers comprised in the series Gr or manually by the adjustment of a single switch L or a three-point switch M.

The circuit which when closed causes the magnetization of the magnetic coil 8O for rotating the"motor D clock-wise has been shown in the drawings by means or" broken lines 91 while those which when completed in the .overnor or by means of the switches L or i, energize the magnetic coil 7 9 to turn the .motor in' the opposite ditrection, are shown K in dash-dot lines 92 All the magnet circuits are controlled by the circuit breakers in the series E which normally maintain them in the closed condition and open them only when the sliding element of the transmission moved by the action of the motor D has reached the desired position with relation to the other gears of the same.

In the series of circuit breakers E which are installed on the ledge of the gear case to break the circuits in which theyare connected, by the action ,of the plunger on the rack, the numeral 83 vindicates the unit which controls the circuit through which the current flows to actuateY the motor D for moving he slidingV element of the transmission from the neutral position shown in the drawings to theposition for reversing the movement of the propeller shaft in which position the gear 18 of the said ele- I ment, meshes with the intermediate gear 15.

The circuit breaker 84' controls, the circuits which when closed, causes the sliding element to movefrom eitherv `the'reverse or the low to the neutral position, the circuit breaker vdesignated by the numeral 85 conf trols the circuits which when closed, elect a movement of the element from either the neutral or the intermediate to the low speed position, that designated by the nu# i moral 86 controls the circuits for adjusting' the transmission from either the low or the high speed positionstothe intermediate position, and the circuit breakingunit shown at 87 controls the circuit which when closed, causes a movementof the sliding element from the high spoed position` in which the lclutch member on the gears 19" and 17 are interloc'ked to the intermediate position in' which the gear 19 isl in mesh with the l'gear 23. One of t e -contacts 48`of the circuit controlled bythe circuit breaker 87 is connected with. one of the rings of the governor which in the diagrammatic viewis designaited by. the numeral 60.', the'contacts at one side of the breaks inthe circuits rnormally completed by the'circuit breaking member 86 are connected respectively with the gov-4 ernor rings designated .by the numerals 59 and 58, one of the contacts of one ofthe two sets included in-theclrcuit breaker 85 is connected with the ring' 57 of -the governor, while one of the contacts of the other .set l,of the same breaker is; bynneansfof to the low position at the initial point in the operation of the machine to which the system is applied.

One of the contacts of one of the pairs included .in the circuit breaker 84 is connected withA the ring indicated by the numeral 56 and one of the contacts of the other pair ofthe same circuit breaker, is -connected with one of the contacts 95 of the three-point switch N which provides the means for manually controlling the adjustment of the transmission from the neutral position to thel reverse, and vice versa. One of the contacts of the single circuit controlled by the` unit 83 of the series of circuit breakers E 'is connected with another point 96 of the -three-point switch, the third point 97 and the adjustable member 98 of which are connected at opposite sides ofa break in the conductor 94 which as hereinbefore explained, connects the governor with the source of' electricity.' The other contacts of the circuits which through the intermediary of the` reversing'device H cause the motor D to rotate counter-clockwise are, by means of conductors 99, connected with the windings of the coil 80, and the other contacts of the sets which are disposed at opposite sidesof tliebreaks in the circuits, which when completed effect a rotary movement of the motor armature in the opposite direction, are connected with the windings of' the coil 79 by meansof conductors 100.

The circuit breaking units comprised in the;4 series G of the governor are composed of' sets of contact blades, all of which are fiexible and extend inthe path of the sliding weight 69. `lVhcn the' governor is at rest the circuit breaker 101 nearest its axis.

is, as Shown in Figs,` 3 and 10 ,of the drawiings, closedv by the engagement of the weight A69, ythe said unit controlling the circult which when completed, eiiects a movement fof the sliding element of the'transmission `from Ithe' low position to the neutral 'tion-i A To initially start the car to which the system is applied, after the primary motor has" been put in motion, the driver closes the switch L which causes the current to flow through thejcircuit controlled by the. circuit breaker 85 ofthe series E to energize the magnet .79 which by attraction of the' armature 81`i cl'oses`the circuits 88 of the motor and causes the armature of the same to rotate counter clock-wise to impel through the instrumentality of the rack and pinion movement, the driving element-- of the ptransin the direction ofthe arrow Y. un-

til the gear 18 has been brought in mesh with the low gear 22 when the' propeller shaft is rotated at its lowest speed with relation to the uniform velocity of the driving shaft. Simultaneous with the operative engagementof the two gears,the plunger 49 on the rack reaches a position in register with the opening in the ledge 30 which is normally closed by the disk on the piston of the circuit breaker 85, with the result that said piston is vmoved downwardly andby disengagement of the contacts 48, breaks the circuits of which said contacts are the terminals, and in consequence stops the movement of the motor by denergization of the magnet coil.

If by increase of s eed of the propeller shaft the centrifugal orce moves the weight 69 ofthe governor outwardly it will first of all, open the circuit controlled by the unit 101 and then move the members of the circuit breaker 102 in engagement to move the element 5 of the transmission in a manner.,

identical to that above described, into the intermediate position in which it remains until the Speed of the propeller shaft either increases or decreases when in the one in'- stance thesliding weight willvengage the flexible contact of the unit designated by the numeral 103, to move the element 5 in the position in which the clutch members 20 and21 interlock, or when in the other instance, the weight will by the decrease in the-speed of the governor shaft, move inwardly and bring the contacts of the unit 105 in engagement to move the element 5 from the high posit-ionl to the intermediate position or bring the contacts of the unit 104 in engagement to move the said element from the intermediate position to the low position, Which-movements are accomplished by energizat-ion of the magnet coil 80 which causes the armature 81 to close the circuits which control the clock-wise movement of the armature of the motor D. It will thus be understood that in the-manner described the transmission will be automatically adjusted through the instrumentality ofthe governor to vary the speed of the propeller shaft in response to the resistance encountered and that when the sliding element of the transmission is in the neutral position it may be brought tothelow position by adjustment of the switch L by the driver of the machine.

To reverse the direction of rotation of the propeller shaft with relation to that of the motor shaft, v'the' member v98 of the threepoint switch is moved in engagement with .the point 96 which' breaks the circuit of theA lby the unit 83 of the series E on the ledge 30, until the plunger on the rack breaks the lsaid circuit by depression of the plston of governor and closes that which is controlled i the last mentioned unit when the-'gear 19 of the element has reached the position in which it meshes with-the intermediate gear 15. To return the sliding element of the .transmission to the neutral position, the

member 98 of the three point switch is moved in engagement with the point 95 to vthe intermediary of the transmission, the

members of the clutch B are in frictional engagement to effect the rotative continuity between the first mentioned shaft and the motor of the vehicle, as is shown in Fig. 9 of the drawings, but when the sliding'element is in the neutral position or while it is being impelled4 from one operative position to another the movement of the crank arms 34 on the shaft 36, is through the medium of the pitmen 35 converted into a movement of the rocker shaft 37, by which the male member of the said clutch is disengaged from the female member at the end of the motor shaft 9, as is illustrated in Figsl 1 and 2.

While I have shown and described the I' mechanical devices included in my system in sacrificing any of the advantages of this invention. It will also be understood that the system of electrical connections may be varied fromthat shown and described except to the extent indicated in the following claims.

lVhat I claim and desire Ato secure by Letters-Patent is:

1. In a system of the class described, a driving element, a driven element, an ad justable transmission mechanism adapted to transmit the movement of the said driving element to the driven element at different rates of speed, an electric motor for Y the adjustment of said mechanism, a normally open circuit therefor, a series of circuitbreakers adapted to separately close said circuit when electrically connected, a device responsive to variations in the movementl of the driven element, adapted to successively actuate the said circuit-breakers, and means coperative with the transmission mechanism for opening s aid circuit at determinate points in the adjustment of the'said mechanism.

2. In a system of the class described, aA driving element, a driven element, an adjustable transmission mechanism"adapted to transmit the movement ofthe said driving element to the driven element at diiferent rates of speed, an electric motor for the adjustment of said mechanism, a normally open circuit therefor, a'governor including a rotary member connected to be driven by the movement ofsaid driven element, a

' movable device carried by said member and a series ,of circuit breakers adapted to separately close said circuit when electrically connected, and disposed to be' successively actuated by the said device when impelled by centrifugal force, and means coperative with the transmission mechanism for openin said circuit at determinate points in the ad]ustment: of the 'said mechanism.

3. In a system of the class described, a drivin element, la-driven element, a mechanismv or transmitting the movement of the said driving element tothe driven element at different rates of speed, including an adjustable part, a motor for adjusting said part, a normally open circuit therefor, a series of circuit breakers adapted to separately close the said circuit, when electrically connected, a device responsive to variations inv the movement of the driven element,

adapted to successively actuate the said cir-- cuit-breakers, a series of circuit breakers electrically connected to separately open the said circuit, and means cooperative with the adjustable part of said mechanism for actuating the circuit breakers in the last mentioned series separately at determinate points in lits movement.

4. In a system of the class described, a

driving element, a driven element, .a mechanism for transmitting the movement of thel -said driving element to the driven element at dilferent rates of speed, including an adjustable part, a motor', a normally open clrcuit therefor,` mechanism for transmittingl the movement of said motor to the said part, including a reciprocatory-member, a series of circuit breakers adapted to separately Y close vthe said circuit when electrically vconnected, a device responsive to variations in the movement ofthe driven element, adapted to successively actuate said circuit-breakers, a series 'of circuit-breakers connected to separately open said circuit, and means on said reciprocatory member adapted to sepa-i rately actuate the circuit breakers of the last mentioned series, to ,open-the circuit at vdeterminate points in the movement ofthe' adjustable part of the 'transmission mechanism.

'5. In a system-of the class described, .a

Adriving element, a driven element, a mecha'- nism for transmitting the movement of the said driving element to the drivenelement at connection l p l 1 y i the said transmission mechanlsmldurm'gthe" v different rates of speed, including an ,adinstable part, a clutch adapted to discontinne the operative connection vbetween said driving element andl'said mechanism, a motor, a normally open circuit therefor, means adapted to convert the movement of said motor into an operativevmovement of said part and to simultaneously VVeii'ectfan'.

adjustment ofsaid clutch tol discontinue lthe periods o f inactiollof the latter, la series of between the driving elementjand" circuit breakers adapted separately close a device responsive to variations in the movement of the driven element, adapted to successively actuate the said circuit-breakers, and means cooperative with the adjustable part of the transmission mechanism for opening said circuit at determinate points in the movement of the'said part.

6.V In a system ofthe class described,.a driving element, a driven element, a mechanism for transmitting the movement of t-he said driving element to the driven element at different rates of speed, including an adjustable part, a clutch adapted to discontinue the operative connection between said driving element and said mechanism, a motor, a normally open electric circuit therefor, a rotary shaft in 'operative con; nection with said motor and having oppositely extending crank arms, means for transmitting a movement of said shaft to the Said adjustable part, a rocker-shaft in operative connection with said clutch and having crank arms extending in one direction, pitmen pivotally connected. with the crank arms on the first mentioned shaft and having longitudinal slots in which the wrists 'ofthe crank arms of the rocker-shafty loosely extend, a series of circuit-breakers adapted to separately close the said vcircuit when electrically connected, a device responsive to variations in the movement of the driven element', adapted to successively actuate .the said circuit-breakers, and means cooperative with the adjustable part of the transmission mechanism for opening said circuit atdeterminate points in the movement of the said part. i

7. In a system of the class described, a

4driving element, a driven element, a mechanism for transmitting the movement of the said driving element to the driven element,

including a part adapted to be adjusted from` a neutral position toyany one of a number of Vpositions for varying the speed of the driven element relative to that of the driving element, a motor for -adjustmg said part, a normally open circuit therefor, a series of circuit breakers adapted to separately close the said circuit when electrically connected,'

a device responsive to variations in the movement of the driven elementi, adapted to successively actuate said circuit breakers, manually operated means for moving said part from its neutral position to its position by which the movement of the drivlng ele- 'f ment is transmitted to the driven element at the lowest speed, and means vcooperative with the adjustable part of the transmission mechanism for opening said circuit at determinate points in the movement of the sa-id art.

driving element, a. driven element, a mecha- 1ro v nisml for transmitting the movement of the said driving element to the driven element, including a part adapted to be adjusted from a neutral position to any one of a number of positions for varying the speed of thegdriven element relative to that of the driving element, a motor for adjusting said part, a normally open circuit therefor, a series of circuit breakers adapted to separately close the said circuit when electrically connected, a device responsive to variationsl in the movement of the driven element, adapted to successively actuate said circuit-breakers, manually operated electrical connections for closing the said motor-circuit to move the said part from its neutral position toits posit-ion by which the movement of the driving element is transmitted to the driven element` at the lowest speed, and means coperative with the adjustable part of the transmission mechanism for opening said circuit/at determinate points in the movement of the said art. p 9. In a system of the class described, a driving element, a driven element, a mecha.- nism lfor transmitting the movement of the said driving element to the driven element including a part adapted to be adjusted from a neutral osition to any one of a number of positions or varying the speed of the driven element relative tothat of the driving elemen-t or to a position for reversing the movement ofthe driven element relative to that of the driving` element, a`motor for adjusting said part, a normally open circuit therefor, a series' of circuit breakers adapted to separately close the said circuit when electrically connected, a device responsive to variatlons in the movement of the driven element, adapted to successively actuate said circuit-breakers, manually operated means for moving said part from its neutral position to its position by which the movement of the driving element is transmitted to the driven element at the lowest speed, and for moving said part from its neutral position to its position by which the movement of the driven element is reversed, and vice versa, and vmeans cooperative with the adjustable part of the transmission mechanism for opening said circuit at determinate points inthe movement of the said part.

10. In a system of the class described, a drivin element, a driven element, a mechanism ortransmitting the movement'oflthe said driving `element to the driven element, including a part adapted-to be adjusted from a neutra position to any one of a number of positions for varying the speed of the driven element relative to that of the driving elementor t-o a' position for reversing the moveL ment of the driven element relatlve to that ofthe driving element, a motor for adjusting said part, a normall. open circuit therefor, a series of clrcuit reakers adapted to separatelyl close t-he said circuit when electrically connected, a device responsive to variations in t-he movement of the driven element, adapted to successively lactuate said circuit-breakers, manually operated electrical connections for closing the said motor circuit for moving said part from its driving element, a driven element, an adjustable transmission mechanism adapted to transmit the movement of said driving element to the driven element at different rates of speed, a reversible motor, for adjusting said mechanism, normally open electric circuits therefor, an electrically operated switch for closing said circuits to rotate said motor in either direction, and means responsive to variations in the movement of said drivenelement for operating said switch, when the movement of said driven element changes to any one of a'number of predetermined speeds.

12. In asystem of the class described, a driving element, a` driven element, an adjustable transmission mechanism adapted to transmit the movement of said driving ele'- y ment to the driven element at different rates of speed, a reversible motor for adjusting said mechanism, normally open circuits therefor, an electrically operated switch for closing said circuits to rotate said motor in either direction, a series of circuit breakers adapted to separately close the ,normally open circuits in which said switch is connected, a device responsive to variations in the movement of the driven element yto suc-I cessively actuate said circuit-breakers, and

means coperativewith the' transmissionmechanlsm lfor opemngthe sald circuits'of the instrument at determinate points in the adjustment of said mechanism.

13. In a system of the class described, a driving element, a driven element, an adjustable transmission mechanism adapted to transmit the movement of said driving element to the driven element at different' rates of speed, a reversible motor lfor adjusting said mechanism,normally open circuits therefor, an electrically operated switch for closing said circuits to rotate saidl motor in either` direction, a series of circuit breakers adapted to separately close thev normally open circuits in which said instrument is connected, a device responsive to variations ftifthe movement' of fthe" driven' element to ',tiieeessively Aact-uate said circuitebreakers, a series of circuit 'bre'akers to separately open the said ,circuits otheswiitch, and means cooperative with 'te t -ransmis'sion mechanism for actuating the'circuitbreakers comprised in the'last Jmedtioned'fseries, separately'at determinate :points in the adj ustm'entof said mechanism.

A drii'fin'g'element, a driven element, an adjustable transmission lrmechanism adapted "to "transmit the movement of said driving ele- *said vgme'ch'anism, normally ment 'to the driven element' 'at different rates "of Speed, a reversible motorfor" adjusting open circuits therefor,=1an 'electrically operated switch for closingsaid circuits lto rotate said-fmotor in l either' direction, comprising two electro-magan armature adapted to be=m`oved of either coil'- andi circuit breakers" adapted to close the' motor circuits andadapted itobe `closed by the movements net-ic co'ils,

- of said armature, a series of circuit breakers fbreakers', 1 and A electrically connected to separately energize either magnet, a device tions inthe :movementfof :'saiddriven ele-v ment to successively actuate said circuit means cooperative 'with' the transmission mechanism for den'ergizing said magnets at determinate points-in-the adjustment of said mechanism. ,j-

15. In a' system of the class V driving element, a driven element, anv ad l rates' of speed', a reversible motor for iid-vy -justable transmission mechanism adapted to transmit the movement of said driving element to the driven element at diierent normally open cirjusting said mechanism,

operate cuits therefor, an electrically` switch for closing said circuits to rotate the motor in either direction, comprising two electro-magnetic coils, normally open circuits/therefor, an armature adapted to be moved by energization of either coil, and circuit breakers adapted. to close the motorcircuits and adapted 'to be closed 4by the movemen s of' said armature, a series of circuit breakerselectrically connected t0' separately .close the circuit of either maignet, a devicevresponsive to .variations in the movement of said driven element tosuccessively actuate said circuit breakers, a series of 'circuit lbreakers separately open the magnet circuits, and means coperatiyev with the transmission mechanism-for actuating-the circuit break-4' ers of thelast mentioned series separately at determinate points inthe adjustment ofv o0- .the said -mechanism.

16. In a system of drivin element, a Idriven: element,I a mecha-A "nism or transmitting-'the' movement of the said `-driving elementktothe driven element, including a part' adapted to' be adjusted f from azneut-ral position to any electrically coni mechanism mentof the said part.

@firing elementi mism for' ftransmi -saiddriving 'element responsive to varia-vV vincluding apart a'daptedlto be adjusted 'from 'driven' element-relative to- .that of described, a-f

.is transmitted to the electricallyl connected to .driving element,

the classdescribed, al

one, of a number'of posit-ionsfor varying the speed of justing said part, normally open circuits therefor, 'anelectrically operated switch for closing the motor circuits to rotate the motor in--either -di'rection, normally openA cirf'cuits'? for said switch, a`series of .circuit *breakers4 adapted to separately close either circuit of said switch,"'manually` operated 'electrical connections' for closingone of the 'motor circuits'to move'the saidpart from "the driven"l element nrelative to that of the v 'drilling element, a reversible motor for ad- Vits neutral' position toits position by which i the -movement of the. vvdriving element is transmitted' to' the'driven element at the lowest'speed, and means cooperative4 with said adjustable part 'of theI transmission for openingzthe circuits of the switch atfdeterminate pointsIv int4 the move- 17 Inl a system of `the class described, a

a driven element, a f mecha- `tting Ilthe' movement- Vof the 'to' th'-e driven element,`

a'neutral 'position-to- 'any 'one' of a number of positions 'for varying the speed of the the-driv ing element or to a position for reversing the -movement of the driven element relative to that of the driving' element, a reversible motor for adjusting said part, normally open' circuits therefor, an electrically operated switch for closing Ithe motor circuits to rotate'the motor in either direction, normally open circuits for said switch, a series of cir-I cuit breakers vadapted to separately close either circuit of said switch, manually operated electrical connections for closing one of the motor.- circuits to'move the said part from its neutral` position to its position by which theV movement of the driving element Y thecircuits of the switch at in the movement of the driven element at the 11! 0f the transmission mechanism diierent rates of speed, a clutch adapted to discontimie the operative connection between saidy driving element and said mecha:

nism, a reversible motor, normally open circuitstherefor, an electricallyoperated switch for closing either of the motor-circuits to rotate'the motor in opposite direcvi ai tiens, noi elly open eircuis fer ineens adeeied 'to convert the nieve ille nioof ino an edjustinen'; of s mechenism and Jco simultaneously effect en edjnstnient of the claitcli to discontinue the connection between the di'ivingelement and `the transmission mechanism during Jdie periods that', the latter is inactive, o. series of cii'- cuit-bieakers adapted to seperately close either circuit of said switch, a. device responsive to variations in the movement of the driven element to successively ectuate Seid circuit-brenlieis, and means copera-ive with the transmission mechanism foi opening the circuits of seid switch at determinate points in the adjustment of said mechanism.

19. in n system of he class desciibed, a driving element, e drive-n element, a. mechenism for transmitting vlie movement of seid driving' element to the driven element eff different rai-es of speed e clutch adapted to discontinue the operative yconnection loetWeen said driving element and. seid mechenism, ai'reversiole moioi, normally open circuits faheiejoii an eiec'srically 'opei'ated switch for closing either of the motor-cir- Low- euits te rotate the mot-oi' in opposite directions, normally open circuits for seid switch, ineens adaped to eonveiff ldie movements of the motor in''o an djustmen: of seid mechanism and o Simultaneously effect an adjustment of the cluiieh 'o discontinue "che eeni nection be2-Ween she driving eienient end the ifensmission mechanism during the peiiods that the letter is inacive., e series ef circuit breakers adapted to seperately close either Vcircuit of seid switch7 e. device responsive to variations in lie movemenl of the driven elemen to' successively eciiue'te said circuit breekeisv :L sei'ies of eiicui-bieakeis electrcallv connected to senese-telf] open the circuits of seid switch, and means coperetive with the transmission meohenism foi: actuating the circuit breakers coinpisised in the last mentioned series :it determinate points in he movement o seid mechanism. lin /estimony Whei'eoiE have aiixed my signature in piesence of two Winesses.

RALPH BRADLEY.

Vlitnesses:

B. A. Gomme, S. M. Giens. 

